YES, I did solve this post as I was writing it. YES, I am still going to post it. THE PROBLEM WAS THAT THERE WAS A CHESS TABLE IN FRONT OF MY THRONE. This does not prevent people from using the throne, but during the bestow ceremony they need that spot apparently.

Relevant snippet of logs below. The link has the entirety that got uploaded.

First, I am playing with mods, but even after I disable literally all mods and start this quest fresh to do the bestow ceremony it still does this, so I don’t think it’s the mods. Also as the title says this is 1.5. If I was playing on 1.6 I would upload these to a more official source.

When I tell my royal to begin the bestow ceremony, he just idles. Nobody else reacts to join, they just keep doing whatever. He just sits there, frozen in time. I let the game run for ~12 hours (in-game) and he still hadn’t moved.

Searching around this seems to be somewhat of a known bug, but I’m not seeing anything about these logs specifically. I have tried calling the bestower in multiple times and each time he freezes. Even when I do the “cancel ceremony” and call them back later it does the same thing. Even when I remove all the optional spectators it does this.

In the bottom right you can see Grump idling. In the bottom left you can see that he is trying to attend the bestow ceremony. In the top left you can see the bestower waiting.

Failed to find a spectator spot for Rofro 
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 39)

Failed to find a spectator spot for Unay 
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 39)

Failed to find a spectator spot for Grill 
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 39)

Failed to find a spectator spot for Prosecco 
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 39)

Failed to find a spectator spot for Herc 
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 39)

Failed to find a spectator spot for Dani 
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 39)

Failed to find a spectator spot for Marty 
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 39)

Failed to find a spectator spot for Lion 
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 39)

Failed to find a spectator spot for Rofro 
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 39)

TryMakePreToilReservations() returned false for a non-queued job right after StartJob(). This should have been checked before. pawn = Grump, curJob = BestowingCeremony (Job_5837199) A = Thing_Human922515 Giver = JobGiver_BestowingCeremony [workGiverDef: null] 
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 39)

Failed to find a spectator spot for Isarita 
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 39)

Failed to find a spectator spot for Lynx 
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 39)

Failed to find a spectator spot for Gillespie 
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 39)

Failed to find a spectator spot for Prosecco 
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 39)

TryMakePreToilReservations() returned false for a non-queued job right after StartJob(). This should have been checked before. pawn = Grump, curJob = BestowingCeremony (Job_5837443) A = Thing_Human922515 Giver = JobGiver_BestowingCeremony [workGiverDef: null] 
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 39)

Failed to find a spectator spot for Rofro 
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 39)

TryMakePreToilReservations() returned false for a non-queued job right after StartJob(). This should have been checked before. pawn = Grump, curJob = BestowingCeremony (Job_5837531) A = Thing_Human922515 Giver = JobGiver_BestowingCeremony [workGiverDef: null] 
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 39)

Failed to find a spectator spot for Wingman 
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 39)

Failed to find a spectator spot for Rofro 
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 39)

TryMakePreToilReservations() returned false for a non-queued job right after StartJob(). This should have been checked before. pawn = Grump, curJob = BestowingCeremony (Job_5837775) A = Thing_Human922515 Giver = JobGiver_BestowingCeremony [workGiverDef: null] 
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 39)

TryMakePreToilReservations() returned false for a non-queued job right after StartJob(). This should have been checked before. pawn = Grump, curJob = BestowingCeremony (Job_5838023) A = Thing_Human922515 Giver = JobGiver_BestowingCeremony [workGiverDef: null] 
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 39)

TryMakePreToilReservations() returned false for a non-queued job right after StartJob(). This should have been checked before. pawn = Grump, curJob = BestowingCeremony (Job_5838272) A = Thing_Human922515 Giver = JobGiver_BestowingCeremony [workGiverDef: null] 
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 39)

More in depth log message about the TryMakePreToilReservations().

TryMakePreToilReservations() returned false for a non-queued job right after StartJob(). This should have been checked before. pawn = Grump, curJob = BestowingCeremony (Job_5837036) A = Thing_Human922515 Giver = JobGiver_BestowingCeremony [workGiverDef: null]
UnityEngine.StackTraceUtility:ExtractStackTrace ()
Verse.Log:Warning (string)
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:Verse.AI.Pawn_JobTracker.StartJob_Patch1 (Verse.AI.Pawn_JobTracker,Verse.AI.Job,Verse.AI.JobCondition,Verse.AI.ThinkNode,bool,bool,Verse.ThinkTreeDef,System.Nullable`1<Verse.AI.JobTag>,bool,bool,System.Nullable`1<bool>,bool,bool,bool)
Verse.AI.Pawn_JobTracker:CheckForJobOverride_NewTemp (single,bool)
Verse.AI.Pawn_JobTracker:CheckForJobOverride (single)
RimWorld.LordToil_BestowingCeremony_Perform:UpdateAllDuties ()
Verse.AI.Group.Lord:GotoToil (Verse.AI.Group.LordToil)
Verse.AI.Group.Transition:Execute (Verse.AI.Group.Lord)
Verse.AI.Group.Transition:CheckSignal (Verse.AI.Group.Lord,Verse.AI.Group.TriggerSignal)
Verse.AI.Group.Lord:CheckTransitionOnSignal (Verse.AI.Group.TriggerSignal)
Verse.AI.Group.Lord:ReceiveMemo (string)
RimWorld.LordToil_BestowingCeremony_Wait:StartRitual (System.Collections.Generic.List`1<Verse.Pawn>)
RimWorld.LordToil_BestowingCeremony_Wait:<ExtraFloatMenuOptions>b__7_1 (RimWorld.RitualRoleAssignments)
RimWorld.Dialog_BeginRitual:<Start>g__InnerStart|38_0 ()
RimWorld.Dialog_BeginRitual:Start ()
RimWorld.Dialog_BeginLordJob:DoButtonRow (Verse.RectDivider&,bool)
RimWorld.Dialog_BeginLordJob:DoWindowContents (UnityEngine.Rect)
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:Verse.Window.InnerWindowOnGUI_Patch0 (Verse.Window,int)
UnityEngine.GUI:CallWindowDelegate (UnityEngine.GUI/WindowFunction,int,int,UnityEngine.GUISkin,int,single,single,UnityEngine.GUIStyle)